#71597, reported by Morten Welinder

#71597, reported by Morten Welinder

Tue Jun  3 17:39:16 2003  Owen Taylor  <otaylor@redhat.com>

        #71597, reported by Morten Welinder

        * gdk/gdkpixbuf-drawable.c (rgb888amsb): Fix and simplify
        (Patch from Christian Petig)

        * gdk/gdkpixbuf-drawable.c (rgb{555,565}{a,}{msb,lsb}):
        Major rewrite of 555 and 565 conversion routines:

        - Move all the bit shifting into a small block of macros,
          eliminating much duplication of complicated arithmetic.
        - Get rid of 2-pixels at a time code, which was buggy,
          hard to maintain, caused unaligned accesses, and
          probably didn't actually perform any better.
        - Simplify cases where different data types were
          used for the little and big endian cases, use
          GUINT16_SWAP_LE_BE() where appropriate.